Circuit/System Testing

Ignition OFF, disconnect the underhood junction block connector X2, and the power steering control module connector X1.
Ignition ON, verify signal voltage between the power steering connector X12, terminal 5 (male side) and ground. The signal voltage should be less then 0.3 volts.
- If greater than the specified value, verify the vehicle does not carry a rear junction block. Test for a short to voltage on the engine running signal circuit, between power steering connector X12, terminal 5 (male side) and connector X2, terminal 26 (wiring harness side) of the underhood fuse block. Test for a short to voltage of underhood junction block connector (wiring harness side) terminal 5, underhood junction block (wiring harness side) terminal 40, underhood junction block connector (wiring harness side) terminal 8, and electro hydraulic power steering module (wiring harness side) terminal 5.

If less than the specified value, verify the vehicle carries a rear junction block. Test the signal circuit for a short to ground or open/high resistance on the engine running signal circuit, between power steering connector X12, terminal 5 (male side) and connector X2 and terminal 26 (wiring harness side) of the underhood fuse block.

If less than the specified value, verify the vehicle does not carry a rear junction block. Test the signal circuit connector X2, terminal 40 and ground of the underhood junction block for a short to voltage. If the circuit tests normal, test or replace the underhood junction block.